Superposition of DC Voltage and Submicrosecond Impulses for Energization of Electrostatic Precipitators

Abstract

Abstract-This paper discusses the development of an impulsive microelectrostatic precipitation technology, which uses superposition of submicrosecond high-field pulses and dc electric field. Short impulses allow the application of higher voltages to the ionization electrodes of a precipitation system without the initiation of breakdown. These higher levels of electric field generate higher ionic concentrations, resulting in more efficient charging of the airborne particles, and can potentially improve precipitation efficiency. This work is focused on the analysis of the behavior of impulsive positive corona discharges in a coaxial reactor designed for precipitation studies. The efficiency of precipitation of coarse and fine particles has been investigated using different dc and impulse voltage levels in order to establish optimal energization modes.

Impulsive Corona Discharges for Fine Particles Precipitation in a Coaxial Topology

“…The present paper is focused on an investigation of the use of impulsive corona discharges in atmospheric air for charging and removal of fine and ultra-fine particulate matter from an air flow. This work continues the study of the impulsive micro-electrostatic precipitation process initiated by the authors; previously obtained results on impulsive precipitation of powder particles and charging mechanisms in the transient corona discharges are published in [6], [10].…”

Analysis of particle charging mechanism for optimisation of precipitation efficiency

“…Therefore, effective air-cleaning technologies for the emission control of fine and ultra-fine particles are required. In a recent paper [2] an impulsive micro-electrostatic precipitation technology has been proposed and investigated. This technology combines dc and impulsive energisation of electrostatic precipitators.…”